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Saad A, Chauhan A, Tripathi S, Kumar M. Arthrogryposis, renal dysfunction, cholestasis syndrome in a neonate: an uncommon association of common problems. BMJ Case Rep 2023; 16:e254822. [PMID: 37202112 PMCID: PMC10201215 DOI: 10.1136/bcr-2023-254822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023] Open
Abstract
A male infant born out of non-consanguineous marriage to a primigravida presented to us as his third hospitalisation with ichthyotic lesions all over the body, cholestatic jaundice, multiple joint contractures and a history of recurrent sepsis. Blood and urine investigations revealed Fanconi syndrome, hypothyroidism and direct hyperbilirubinaemia with elevated liver enzymes and normal gamma glutamyl transpeptidase levels. The combination of arthrogryposis, renal dysfunction and cholestasis led to the suspicion of arthrogryposis, renal tubular dysfunction, cholestasis (ARC) syndrome, which was then proved by genetic testing. The baby was managed conservatively with respiratory support, antibiotics, multivitamins, levothyroxine and other supportive measures but succumbed to the illness on day 15 of hospitalisation. Genetic analysis using next-generation sequencing was confirmatory of a homozygous mutation in VIPAS39 gene leading to ARC syndrome type 2 in the present case. Genetic counselling was provided and prenatal testing was advised to the parents for future pregnancies.
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Affiliation(s)
- Aamina Saad
- Department of Pediatrics, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Avantika Chauhan
- Department of Pediatrics, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Shalini Tripathi
- Department of Pediatrics, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Mala Kumar
- Department of Pediatrics, King George's Medical University, Lucknow, Uttar Pradesh, India
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2
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Zhu Y, Chen D. Two novel mutations in VPS33B gene cause a milder ARC syndrome with prolonged survival in a 12-year-old patient: Case report. Front Pediatr 2022; 10:1041080. [PMID: 36568436 PMCID: PMC9768213 DOI: 10.3389/fped.2022.1041080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Accepted: 11/15/2022] [Indexed: 12/12/2022] Open
Abstract
Arthrogryposis-renal dysfunction-cholestasis (ARC) syndrome is a rare autosomal recessive disease caused by VPS33B and VIPAR gene mutations. The main clinical manifestations are congenital joint contracture, renal dysfunction mainly characterized by distal renal tubular dysfunction, and low glutamyltransferase cholestasis. Most patients with ARC die within 2 years of birth. Here, we report the case of a 12-year-old girl with an ARC phenotype who experienced long-term survival with only mild clinical symptoms. We detected two new heterozygous mutation sites of the VPS33B gene in this child, c.1081C > T (p.GLN361X, 257) and c.244T > C (p.Cys82Arg), through the gene detection technique; the tertiary structure of the protein was predicted by using the SWISS-model. We further reviewed the literature and summarized the clinical manifestations and gene loci of 19 ARC syndrome patients with long-term survival reported so far.
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Affiliation(s)
- Yingjie Zhu
- Department of Emergency/Critical Care Medicine, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Dongmei Chen
- Department of Emergency/Critical Care Medicine, Children's Hospital of Nanjing Medical University, Nanjing, China
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3
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Adamczyk-Gruszka O, Horecka-Lewitowicz A, Zmelonek-Znamirowska A, Gruszka J, Koziel D, Lewitowicz P. A New Aberration in the VPS33B Gene Leads to Full-Symptom ARCS1. AMERICAN JOURNAL OF CASE REPORTS 2021; 22:e932769. [PMID: 34531360 PMCID: PMC8455109 DOI: 10.12659/ajcr.932769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 08/06/2021] [Accepted: 07/02/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND ARCS1 is an acronym for arthrogryposis, renal dysfunction, and cholestasis. It is a congenital malfunction with autosomal recessive inheritance, and, unfortunately, its prognosis is still poor. It is believed that VPS33B is altered in 75% of cases and that the VIPAR gene is altered in approximately 25% of them. CASE REPORT An affected child was born from the first pregnancy of 26-year-old mother and a 30-year-old father with no previous medical history and no genetic conditions. The first clinical symptoms were observed at the end of the child's second week of life. The mother reported the child has decreasing body weight and loss of appetite. After admission to the ward, the child was apathetic and sleepy. Symptoms of conjunctivitis, pale and dry skin, and mild face and mild body dysmorphia were observed. CONCLUSIONS Laboratory tests revealed proteinuria of up to 1.36 g/l and glycosuria of up to 28 mmol/l, as well as fluctuating metabolic acidosis. The bilirubin level reached 6.62 mg/dl, along with alkaline phosphatase at 470 U/l. Moreover, hypothyroidism with TSH at 16.71 uU/ml was observed. Because of the co-occurrence of cholestasis and renal dysfunction, molecular testing was done. The 17th exon of VPS33B was sequenced by Sanger DNA sequencing method. To the best of our knowledge, this is the first report of homozygotic mutation c.1235_1236delinsG (p.Pro412ArgfsTer7) in the VPS33B gene. The risk of transfer of the mutation to future descendants was calculated as 25%. Due to the wide landscape of molecular alternation in the 17th exon of the VPS33B gene, we propose using Sanger whole-exon sequencing as a first-choice diagnostic test.
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Affiliation(s)
- Olga Adamczyk-Gruszka
- Department of Gynaecology and Obstetrics, Institute of Medical Sciences, Jan Kochanowski University, Kielce, Poland
- Department of Obstetrics and Gynecology, Province Hospital, Kielce, Poland
| | - Agata Horecka-Lewitowicz
- Department of Clinical Psychology and Psychiatry, Institute of Health Sciences, Jan Kochanowski University, Kielce, Poland
| | - Anna Zmelonek-Znamirowska
- Department of Gynaecology and Obstetrics, Institute of Medical Sciences, Jan Kochanowski University, Kielce, Poland
| | - Jakub Gruszka
- 2 Department of Obstetrics and Gynaecology, Medical University of Warsaw,Warsaw, Poland
| | - Dorota Koziel
- Institute of Health Sciences, Jan Kochanowski University, Kielce, Poland
| | - Piotr Lewitowicz
- Department of Clinical and Experimental Pathology, Institute of Medical Sciences, Jan Kochanowski University, Kielce, Poland
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4
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Yıldız Y, Koşukcu C, Aygün D, Akçaboy M, Öztek Çelebi FZ, Taşcı Yıldız Y, Şahin G, Aytekin C, Yüksel D, Lay İ, Özgül RK, Dursun A. Homozygous missense VPS16 variant is associated with a novel disease, resembling mucopolysaccharidosis-plus syndrome in two siblings. Clin Genet 2021; 100:308-317. [PMID: 34013567 DOI: 10.1111/cge.14002] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/12/2021] [Accepted: 05/18/2021] [Indexed: 12/17/2022]
Abstract
Disorders of intracellular trafficking are a group of inherited disorders, which often display multisystem phenotypes. Vacuolar protein sorting (VPS) subunit C, composed of VPS11, VPS18, VPS16, and VPS33A proteins, is involved in tethering of endosomes, lysosomes, and autophagosomes. Our group and others have previously described patients with a specific homozygous missense VPS33A variant, exhibiting a storage disease phenotype resembling mucopolysaccharidosis (MPS), termed "MPS-plus syndrome." Here, we report two siblings from a consanguineous Turkish-Arabic family, who have overlapping features of MPS and intracellular trafficking disorders, including short stature, coarse facies, developmental delay, peripheral neuropathy, splenomegaly, spondylar dysplasia, congenital neutropenia, and high-normal glycosaminoglycan excretion. Whole exome sequencing and familial segregation analyses led to the homozygous NM_022575.3:c.540G>T; p.Trp180Cys variant in VPS16 in both siblings. Multiple bioinformatic methods supported the pathogenicity of this variant. Different monoallelic null VPS16 variants and a homozygous missense VPS16 variant had been previously associated with dystonia. A biallelic intronic, probably splice-altering variant in VPS16, causing an MPS-plus syndrome-like disease has been very recently reported in two individuals. The siblings presented herein display no dystonia, but have features of a multisystem storage disorder, representing a novel MPS-plus syndrome-like disease, associated for the first time with VPS16 missense variants.
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Affiliation(s)
- Yılmaz Yıldız
- Division of Pediatric Metabolism, Department of Pediatrics, Faculty of Medicine, Hacettepe University, Ankara, Turkey.,Department of Pediatric Metabolic Diseases, Dr. Sami Ulus Training and Research Hospital for Maternity and Child Health, Ankara, Turkey
| | - Can Koşukcu
- Division of Pediatric Metabolism, Department of Pediatrics, Faculty of Medicine, Hacettepe University, Ankara, Turkey.,Department of Bioinformatics, Institute of Health Sciences, Hacettepe University, Ankara, Turkey
| | - Damla Aygün
- Division of Pediatric Metabolism, Department of Pediatrics, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Meltem Akçaboy
- Department of Pediatrics, Dr. Sami Ulus Training and Research Hospital for Maternity and Child Health, Ankara, Turkey
| | - Fatma Zehra Öztek Çelebi
- Department of Pediatrics, Dr. Sami Ulus Training and Research Hospital for Maternity and Child Health, Ankara, Turkey
| | - Yasemin Taşcı Yıldız
- Department of Pediatric Radiology, Dr. Sami Ulus Training and Research Hospital for Maternity and Child Health, Ankara, Turkey
| | - Gülseren Şahin
- Department of Pediatric Gastroenterology, Dr. Sami Ulus Training and Research Hospital for Maternity and Child Health, Ankara, Turkey
| | - Caner Aytekin
- Department of Pediatric Allergy and Immunology, Dr. Sami Ulus Training and Research Hospital for Maternity and Child Health, Ankara, Turkey
| | - Deniz Yüksel
- Department of Pediatric Neurology, Dr. Sami Ulus Training and Research Hospital for Maternity and Child Health, Ankara, Turkey
| | - İncilay Lay
- Department of Medical Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Rıza Köksal Özgül
- Division of Pediatric Metabolism, Department of Pediatrics, Faculty of Medicine, Hacettepe University, Ankara, Turkey.,Institute of Child Health, Hacettepe University, Ankara, Turkey
| | - Ali Dursun
- Division of Pediatric Metabolism, Department of Pediatrics, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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5
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Ning Y, Zeng Z, Deng Y, Feng W, Huang L, Liu H, Lin J, Zhang C, Fan Y, Liu L. VPS33B interacts with NESG1 to suppress cell growth and cisplatin chemoresistance in ovarian cancer. Cancer Sci 2021; 112:1785-1797. [PMID: 33788346 PMCID: PMC8088924 DOI: 10.1111/cas.14864] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/12/2021] [Accepted: 02/17/2021] [Indexed: 12/12/2022] Open
Abstract
The pathogenesis and cisplatin chemoresistance of ovarian cancer (OC) are still unclear. Vacuolar protein sorting‐associated 33B (VPS33B) has not been reported in OC to date. In this study, immunohistochemistry was used to detect VPS33B protein expression between OC and ovarian tissues. MTT, EdU, colony formation, cell cycle, in vivo tumorigenesis, western blot, ChIP, EMSA, co‐immunoprecipitation (CoIP), qRT‐PCR, and microconfocal microscopy were used to explore the function and molecular mechanisms of VPS33B in OC cells. The results of the present study demonstrated that VPS33B protein expression was obviously reduced in OC compared with that in ovarian tissues. Overexpressed VPS33B suppressed cell cycle transition, cell growth, and chemoresistance to cisplatin in vitro and in vivo. Analysis of the mechanism indicated that overexpressed VPS33B regulated the epidermal growth factor receptor (EGFR)/PI3K/AKT/c‐Myc/p53/miR‐133a‐3p feedback loop and reduced the expression of the cell cycle factor CDK4. Nasopharyngeal epithelium‐specific protein 1 (NESG1) as a tumor suppressor not only interacted with VPS33B, but was also induced by VPS33B by the attenuation of PI3K/AKT/c‐Jun‐mediated transcription inhibition. Overexpressed NESG1 further suppressed cell growth by mediating VPS33B‐modulated signals in VPS33B‐overexpressing OC cells. Finally, NESG1 induced VPS33B expression by reducing the inhibition of PI3K/AKT/c‐Jun‐mediated transcription. Our study is the first to demonstrate that VPS33B serves as a tumor suppressor, and VPS33B can interact with NESG1 to suppress cell growth and promote cisplatin sensitivity by regulating the EGFR/PI3K/AKT/c‐Myc/p53/miR‐133a‐3p feedback loop in OC cells.
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Affiliation(s)
- Yingxia Ning
- Department of Gynecology, the Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.,Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhaoyang Zeng
- Department of Gynecology, the Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yuao Deng
- Department of Gynecology and Obstetrics, Shenzhen People's Hospital, Shenzhen, China
| | - Weifeng Feng
- The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Lun Huang
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Huiling Liu
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jiazhi Lin
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Chen Zhang
- Department of Clinical Pharmacy, Guangzhou First People's Hospital, Guangzhou, China
| | - Yue Fan
- Cancer Research Institute, Southern Medical University, Guangzhou, China
| | - Longyang Liu
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
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6
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A Novel Mutation of VPS33 B Gene Associated with Incomplete Arthrogryposis-Renal Dysfunction-Cholestasis Phenotype. Case Rep Genet 2020; 2020:8872294. [PMID: 33029437 PMCID: PMC7532373 DOI: 10.1155/2020/8872294] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 08/28/2020] [Accepted: 09/12/2020] [Indexed: 02/05/2023] Open
Abstract
Arthrogryposis-renal dysfunction-cholestasis (ARC) syndrome is an autosomal recessive disorder caused by mutations of the VPS33B encoding the vacuolar protein sorting 33B (VPS33B), which is involved in the intracellular protein sorting and vesicular trafficking. We report a rare case of ARC syndrome without arthrogryposis caused by a novel mutation of VPS33B. A female patient of Greek origin presented on the 14th day of life with renal tubular acidosis, Fanconi syndrome, nephrogenic diabetes insipidus, and cholestasis with normal gamma-glutamyl transpeptidase, without arthrogryposis and dysmorphic features. She was born to apparently healthy, nonconsanguineous parents. Additional features included dry and scaling skin, generalized hypotonia, hypoplastic corpus callosum, neurodevelopmental delay, failure to thrive, short stature, recurrent febrile episodes with and without infections, and gastrointestinal bleeding. DNA testing revealed that the patient was homozygous for the novel c.1098_1099delTG (p.Glu367Alafs∗17) mutation of exon 14 of VPS33B gene (NM_018668) on chromosome 15q26.1, leading to a nonsense frameshift variant of VPS33B with premature termination of translation. Her parents were heterozygous for the same VPS33B mutation. The prognosis was predictably poor in the context of the intractable polyuria necessitating long-term parenteral fluid administration via indwelling central catheter leading to catheter-related sepsis, to which she eventually succumbed at the age of 7 months. This is the first published VPS33B mutation in an ARC patient of Greek origin. The current case adds to the spectrum of ARC-associated VPS33B mutations and provides evidence supporting the existence of incomplete ARC phenotype. Increased awareness and early genetic testing for ARC are suggested in cases with isolated cholestasis and/or renal tubular dysfunction, even in the absence of arthrogryposis.
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7
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Duong MD, Rose CM, Reidy KJ, Del Rio M. An uncommon case of arthrogryposis, renal dysfunction, and cholestasis (ARC) syndrome and review of the renal involvement: Answers. Pediatr Nephrol 2020; 35:249-251. [PMID: 31463586 DOI: 10.1007/s00467-019-04338-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 08/07/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Minh Dien Duong
- Albert Einstein College of Medicine, Department of Pediatrics, Divisions of Nephrology and Genetics Bronx, Children's Hospital at Montefiore, Bronx, NY, 10467, USA.
| | - Chelsi M Rose
- Albert Einstein College of Medicine, Department of Pediatrics, Divisions of Nephrology and Genetics Bronx, Children's Hospital at Montefiore, Bronx, NY, 10467, USA.,West Virginia School of Osteopathic Medicine, Lewisburg, WV, 24901, USA
| | - Kimberly J Reidy
- Albert Einstein College of Medicine, Department of Pediatrics, Divisions of Nephrology and Genetics Bronx, Children's Hospital at Montefiore, Bronx, NY, 10467, USA
| | - Marcela Del Rio
- Albert Einstein College of Medicine, Department of Pediatrics, Divisions of Nephrology and Genetics Bronx, Children's Hospital at Montefiore, Bronx, NY, 10467, USA
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8
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Chen Y, Liu Z, Wang H, Tang Z, Liu Y, Liang Z, Deng X, Zhao M, Fu Q, Li L, Cai H, Xie W, Fang W. VPS33B negatively modulated by nicotine functions as a tumor suppressor in colorectal cancer. Int J Cancer 2019; 146:496-509. [PMID: 31125123 DOI: 10.1002/ijc.32429] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 04/12/2019] [Accepted: 05/13/2019] [Indexed: 12/19/2022]
Abstract
The biological role of vacuolar protein sorting 33B (VPS33B) has not been examined in colorectal cancer (CRC). We report that VPS33B was downregulated in dextran sulfate sodium/azoxymethane (DSS/AOM) -induced CRC mice models and nicotine-treated CRC cells via the PI3K/AKT/c-Jun pathway. Reduced VPS33B is an unfavorable factor promoting poor prognosis in human CRC patients. VPS33B overexpression suppressed CRC proliferation, intrahepatic metastasis and chemoresistance of cisplatin (DDP) in vivo and in vitro through modulating the epidermal growth factor receptor (EGFR)/RAS/ERK/c-Myc/p53/miR-133a-3p feedback loop and the downstream cell cycle or EMT-related factors. Furthermore, NESG1 as a newly identified tumor suppressor interacted with VPS33B via colocalization in the cytoplasm, and it was stimulated by VPS33B through the downregulation of RAS/ERK/c-Jun-mediated transcription. NESG1 also activated VPS33B expression via the RAS/ERK/c-Jun pathway. Suppression of NESG1 increased cell growth, migration and invasion via the reversion of the VPS33B-modulating signal in VPS33B-overexpressed cells. Taken together, VPS33B as a tumor suppressor is easily dysregulated by chemical carcinogens and it interacts with NESG1 to modulate the EGFR/RAS/ERK/c-Myc/p53/miR-133a-3p feedback loop and thus suppress the malignant phenotype of CRC.
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Affiliation(s)
- Yiyu Chen
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China.,School of Forensic Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Zhen Liu
- Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Huijun Wang
- School of Forensic Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Zibo Tang
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Yiyi Liu
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Zixi Liang
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Xiaojie Deng
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Mengyang Zhao
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Qiaofen Fu
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Libo Li
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Hongbing Cai
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Weibing Xie
- School of Forensic Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Weiyi Fang
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
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van der Beek J, Jonker C, van der Welle R, Liv N, Klumperman J. CORVET, CHEVI and HOPS – multisubunit tethers of the endo-lysosomal system in health and disease. J Cell Sci 2019; 132:132/10/jcs189134. [DOI: 10.1242/jcs.189134] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
ABSTRACT
Multisubunit tethering complexes (MTCs) are multitasking hubs that form a link between membrane fusion, organelle motility and signaling. CORVET, CHEVI and HOPS are MTCs of the endo-lysosomal system. They regulate the major membrane flows required for endocytosis, lysosome biogenesis, autophagy and phagocytosis. In addition, individual subunits control complex-independent transport of specific cargoes and exert functions beyond tethering, such as attachment to microtubules and SNARE activation. Mutations in CHEVI subunits lead to arthrogryposis, renal dysfunction and cholestasis (ARC) syndrome, while defects in CORVET and, particularly, HOPS are associated with neurodegeneration, pigmentation disorders, liver malfunction and various forms of cancer. Diseases and phenotypes, however, vary per affected subunit and a concise overview of MTC protein function and associated human pathologies is currently lacking. Here, we provide an integrated overview on the cellular functions and pathological defects associated with CORVET, CHEVI or HOPS proteins, both with regard to their complexes and as individual subunits. The combination of these data provides novel insights into how mutations in endo-lysosomal proteins lead to human pathologies.
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Affiliation(s)
- Jan van der Beek
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
| | - Caspar Jonker
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
| | - Reini van der Welle
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
| | - Nalan Liv
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
| | - Judith Klumperman
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
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10
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del Brío Castillo R, Squires JE, McKiernan PJ. A novel mutation in VPS33B gene causing a milder ARC syndrome phenotype with prolonged survival. JIMD Rep 2019; 47:4-8. [PMID: 31240160 PMCID: PMC6498830 DOI: 10.1002/jmd2.12027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 02/15/2019] [Indexed: 02/05/2023] Open
Abstract
INTRODUCTION ARC (arthrogryposis, renal dysfunction, and cholestasis) syndrome is an uncommon multisystem disorder that entails a very poor prognosis. It is caused by mutations in either VPS33B or VIPAS39 gene, both playing a key role in intracellular trafficking. We report two siblings born to first cousin parents with a novel mutation in VPS33B who have both shown prolonged survival. CASES PRESENTATION The index patient presented with bilateral hip dysplasia and arthrogryposis, failure to thrive, undernourishment, developmental delay, and low gamma-glutamyl transferase cholestasis. She at age 2 years underwent external biliary diversion with improvement in pruritus but liver disease continued to progress. She developed stomal bleeding at 7 years of age and liver biopsy displayed cirrhosis. Her 3-year-old sibling showed a similar trajectory as well as he had ichthyotic skin with excoriations. Their renal involvement was mild and stable. Genetic analysis in both patients revealed a novel homozygous mutation in NM_018668.4 (VPS33B):c.1157A > C (p.His386Pro). CONCLUSIONS ARC syndrome is a severe disorder with few patients reported to survive beyond 12 months of age. This report discloses a novel mutation in the VPS33B gene and describes a phenotype with prolonged survival, mild renal involvement, and progressive liver disease.
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Affiliation(s)
| | - James E. Squires
- Pediatric HepatologyChildren's Hospital of Pittsburgh of UPMC, University of Pittsburgh Medical CenterPittsburghPennsylvania
| | - Patrick J. McKiernan
- Pediatric HepatologyChildren's Hospital of Pittsburgh of UPMC, University of Pittsburgh Medical CenterPittsburghPennsylvania
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11
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Gupta V, Pandita A, Panghal A, Kallem V. Arthrogryposis, renal dysfunction and cholestasis (ARC) syndrome: a rare association with high GGT level and absent kidney. BMJ Case Rep 2018; 2018:bcr-2017-223715. [DOI: 10.1136/bcr-2017-223715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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12
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Gillies CE, Putler R, Menon R, Otto E, Yasutake K, Nair V, Hoover P, Lieb D, Li S, Eddy S, Fermin D, McNulty MT, Hacohen N, Kiryluk K, Kretzler M, Wen X, Sampson MG. An eQTL Landscape of Kidney Tissue in Human Nephrotic Syndrome. Am J Hum Genet 2018; 103:232-244. [PMID: 30057032 PMCID: PMC6081280 DOI: 10.1016/j.ajhg.2018.07.004] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 06/29/2018] [Indexed: 01/14/2023] Open
Abstract
Expression quantitative trait loci (eQTL) studies illuminate the genetics of gene expression and, in disease research, can be particularly illuminating when using the tissues directly impacted by the condition. In nephrology, there is a paucity of eQTL studies of human kidney. Here, we used whole-genome sequencing (WGS) and microdissected glomerular (GLOM) and tubulointerstitial (TI) transcriptomes from 187 individuals with nephrotic syndrome (NS) to describe the eQTL landscape in these functionally distinct kidney structures. Using MatrixEQTL, we performed cis-eQTL analysis on GLOM (n = 136) and TI (n = 166). We used the Bayesian "Deterministic Approximation of Posteriors" (DAP) to fine-map these signals, eQTLBMA to discover GLOM- or TI-specific eQTLs, and single-cell RNA-seq data of control kidney tissue to identify the cell type specificity of significant eQTLs. We integrated eQTL data with an IgA Nephropathy (IgAN) GWAS to perform a transcriptome-wide association study (TWAS). We discovered 894 GLOM eQTLs and 1,767 TI eQTLs at FDR < 0.05. 14% and 19% of GLOM and TI eQTLs, respectively, had >1 independent signal associated with its expression. 12% and 26% of eQTLs were GLOM specific and TI specific, respectively. GLOM eQTLs were most significantly enriched in podocyte transcripts and TI eQTLs in proximal tubules. The IgAN TWAS identified significant GLOM and TI genes, primarily at the HLA region. In this study, we discovered GLOM and TI eQTLs, identified those that were tissue specific, deconvoluted them into cell-specific signals, and used them to characterize known GWAS alleles. These data are available for browsing and download via our eQTL browser, "nephQTL."
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Affiliation(s)
- Christopher E Gillies
- Department of Pediatrics-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Rosemary Putler
- Department of Pediatrics-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Rajasree Menon
- Department of Computational Medicine and Bioinformatics, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Edgar Otto
- Department of Medicine-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Kalyn Yasutake
- Department of Pediatrics-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Viji Nair
- Department of Medicine-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Paul Hoover
- Department of Medicine, Massachusetts General Hospital Cancer Center, Boston, MA 02114, USA; Broad Institute of the Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA 02142, USA
| | - David Lieb
- Broad Institute of the Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA 02142, USA
| | - Shuqiang Li
- Broad Institute of the Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA 02142, USA
| | - Sean Eddy
- Department of Medicine-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Damian Fermin
- Department of Pediatrics-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Michelle T McNulty
- Department of Pediatrics-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Nir Hacohen
- Department of Medicine, Massachusetts General Hospital Cancer Center, Boston, MA 02114, USA; Broad Institute of the Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA 02142, USA
| | - Krzysztof Kiryluk
- Department of Medicine, Division of Nephrology, College of Physicians & Surgeons, Columbia University, New York, NY, USA
| | - Matthias Kretzler
- Department of Computational Medicine and Bioinformatics, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA; Department of Medicine-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Xiaoquan Wen
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA
| | - Matthew G Sampson
- Department of Pediatrics-Nephrology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA.
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